Pressure-regulated supply-valve.



No. 822,276. PATENTED JUNE 5, 1906.

E. D. HODSDON.

PRESSURE REGULATED SUPPLY VALVE. APPLIUATION FILED Nov. 2o, 1902.

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:,E. D. EUDSDUN. PRESSURE REGULATED SUPPLY VALVE.

APPLICATION FILEDV NOV. 29. 1902.

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Inoervbor Ernest, DsHocdorj, f

(Dit/messes ff/f ERNEST D. HODSDON, OF'LYNN, MASSACHUSETTS, ASSIGNOR, BYMESNE ASSIGNMENTS, TO GENERAL ELE NEW YORK. i

CTRIO COMPANY` A CORPORATION OF PRESSURE-REGULATED SUPPLY-VALVESpecification of Letters Patent.

Application filed November 29, 1902 Serial N0. 133,199.

Patented June 5, 1906.

To all whom it may concern.-

Be it known that I, ERNEST D. HonsDoN, a citizen of the United States,residing at Lynn, county of Essex, State of Massachusetts, have inventedcertain new and useful Improvements inPressure-Regulated Supply-Valves,i which the following is a speciication.

. This invention relates to steam-generating apparatus, and especiallyto flash-boilers W erein the supply of water must be regulated inaccordance with the demand upon the boiler. Various devices foraccomplishing this automatically have been devised, such, for instance,as causing the boiler-pressure to open a by-pass in the feed-pipe whenthe pressure reaches a predetermined maximum. 1

My invention aims to effect a regulation of the Water-supply by causingthe boiler-pressure to automatically close a stop-valve in thesuction-pi e of the water-pump. As the pump is usual y arranged tooperate continuously, this requires it to work agalnst a'vacuum Whenthevalve is closed but in practical operation I find that this is notobjectionable. In the accompanyin drawings, Figure 1 is a diagrammaticview oa flash-boiler, engine, pumps, and tanks with my invention ap liedthereto. Fig. 2 is a section of the regu ator on a larger scale. Fig. 3is a cross-section of the same on the line 3 3, Fig. 2; and Fig. 4 is across-section on the line 4 4, Fig. 2.

The flash-boiler is of any suitable construction, the one shown being ofa well-known type, having an asbestos-lined shell 1 inclosing esteam-generating coil 2 and the superheating-coil 3,located aboveavaorizingurner4 for liquid fuel, which is su p ied by a pump 5 from areservoir 6, in whic an initial air-pressure is maintained by a hand-pum`7. A valve 8 permits the fuel to be fedp to the burner by theair-pressure only, if desired, cutting out the ump 5. The valve ma alsobe used .as a y-pass to regulate the e fective delivery ofthe fuel-pump.

The steam is led from the superheatingcoil to the engine 9, from whichthe exhaust ypasses to a superheater 10 and thence to a downdraft-ilue11. The engine is governed by a throttle-valve and is belted orotherwise mechanicall 12, on whic is an eccentric or the like forconnected with a shaft or axle' driving the water-pump 13 and theoil-pump 5. The water is carried in a tank 14, in which is located myimproved feed-regulat- 'ing valve, which will now be described.

Connected with the intake end of the suc-A tion-pi e 15 is a casing 16,having adjacent to the en of said pipe a cylindrical chamber 17.Inlet-ports 18 open into said chamber, and a port 19 connects it withthe end of the suction-pipe. A ball-valve 20 fits in said chamber andcontrols the port 19 byclosin upon a conical seat 20', surrounding saiport. Attached to said valve is a stem 21, which is provided with ahead, preferably in the shape of a nut 22, screwing on a screwthreadedportion of said stem. A helical spring 23 surrounds the Stem, abuttingagainst the nut at one end and at the other against a shoulder in thecasing or a washer 24, resting thereon. The nut enables the tension ofthe spring to be adjusted at will, the sides of the casing havinglongitudinal openin s or slots 25 to permit access to Ithe nut. ilock-nut 26 may be provided, ifdesired. The end ofthe stem is connectedwith a movable abutment which is eX` osed to the I boiler-pressure. Thisis prefera ly a piston 27, fitting in a cylinder 28, formed ina casting29,'attached to the end of the casing 16. The piston is preferablypacked by waterfrom the tank entering a groove 30 in saidV pistonthrough a small port 31 inthe castingv 29. A pipe 32, connected with thedelive pipe of the Water-pump, enters the end of Ere cy inder beyond theabutment, and, if deslred, a spring safety-valve 33 is arran ed to closea port 34, opening out of said cy inder into the tank.

The water-pump is provided with the usual automatlc suction anddischarge valves, the suction-valve being located intermediate thefeed-re lating device and the pump, while the ischarge-valve is' locatedintermediate the piple 32 and the pump. By this ,arrangement t e passageof wat-er through the suction-pipe 1s controlled by the automaticsuction-valve and the feed-regulating device. The latter when actingthrottles the quantity of waterI fed to the pump. In other Words, twosuction-valves are provided, one of which is operated by thel suctlon ofthe pump and the other by the ressure of the water on the delivery sldeof t e latter.

rool

eration of the device is as iolle'wszl.

holds the ballvalve the pum 13 to The op The hehcal spring 24 normallyopen, allowin draw water freely from t e tank an force it into theboiler; but as soon as the demand upon the bolier is lessened to such anextent that the pressure rises to some predetermined point (say fivehundred and fifty pounds per square inch) such pressure acts upon thepiston 27 and overcomes the tension of the spring, which has beenadjusted to yield at this pressure. The ball-valve is thus closed uponits seat 20 and shuts off the supply oi water to the pump until theboilerpressure falls sufficiently to allow the spring 24 to reo en thevalve. Should4 the boilerpressure A ecome excessive, the safety-valve 33will open and relieve it.

In case there should be a hammer-blow in the operation of the pump itcan be stopped by running a small pipe 35 from the suctionpipe ci thewater-pump up to a point above the water-level in the tank and providingits upper end with a minute opening to the atmos here.

y invention is described in connection with a feed-pump forWater-service, as it has great utility in t at connection; but it can beused for other purposes, if desired.

Une important feature oi" my invention resides in the fact that thepower consumed in o erating the pump varies in proportion to t e demandfor water, it being at a maximum when the demand for Water is greatestand decreasing as the demand lessens. When the demand for water ceasesaltogether, the load is practically removed Jfrom the pump. I attain theadvantage referred to above by reason oi the noyel arran ement and coeration of parts previous y described. he saving of power is a mostimportant consideration, particularly where the storage capacity islimited, as in an automobile.

In accordance with the patent statutes, I have described the principleof operation of m invention, together with the ap aratus willich I nowconsiderto representt e best embodiment thereof; but I desire to have itunderstood that the ap aratus shown is only illustrative and that t einvention pan be carried out by other means.

1What I claim as new, and desire to secure by Letters Patent oi theUnited States, is

1. The combination with a feed-Water pump having a suction-valve throughwhich the Water passes, of means responsive to the abnormal pressure ofthe water for closing the suction-valve and holding it closed so long assaid pressure exists.

2. The combination with a feed-pump, of a valve on the suction sidethereof through which all the Water passes, and means for automaticallyclosing said valve when the pressure of the water 1n the delivery-pipepasses a predetermined maximum.

13L The combination with a feed-pump, of a valve controlling thesuction-pipe thereof, a spring holding said valve normally open, and amovable abutment exposed 'to the pressure on the delivery sideof thepump and connected with said valve.

4. The combination with a feed-pump, of a casing connected with thesuction-pipe thereof, said casing containing a chamber and ports openingthereinto, a ball-valve in said chamber, a spring act-ing to hold saidball-valve oif its seat, and a piston connected with said valve andexposed to the pressure in the delivery-pipe of said pump.

5. In combination, a flash-boiler, a pump for suplying water thereto, asuction-valve for the ump, a regulator for holding the suction-va veclosed when the boiler-pressure exceeds normal, a relief-valve, and aconduit which supplies iiuid under pressure to the regulator andrelief-valve.

6. The combination with a pump, of separate suction-valves throu h whichwater' is drawn by the pump, one o said valves being controlled by thesuction of the pump and the other by the pressure of the water deliveredthereby.

7. The combination With a pum of separate suction-valves therefor, one owhich is normally held open and the other operates automatically underthe action of the pump, and means for closing the normally open valvewhen the pressure of the water delivered by the pump reaches a certainpoint.

8. The combination with a ump and its suction and delivery valves, o afeed-regulating valve through which water passes to the pum and meansresponsive to the pressure of t e Water on the delivery side of the pumpwhich operates the regulating-valve to throttle the water sup lied tothe pump.

9. In a water-supp y system, the combination of a supply-pipe, a pumptherein, and a normally open suction-valve through which the supply ofWater'passes to the pump and ada te to be controlled by the pump accoring to the pressure oi the Water delivered thereby.

10. In a Water-supply system, the combination of a supply-pipe, anormally open suction-valve therein, and a continuously-open ated pumpreceiving its supply throu h the suction-valve .and adapted to close saivalve at a predetermined pressure of the Water which it delivers.

11. In a Water-supply system, the combination of a supply-pipe, anormally open suction-valve therein, a continuously-operated pump adated to receive Water throu h the suction-va ve, and means acted upon ythe water delivered by the pump which is sensitive to pressure variationof the Water for controlling the suction-valve.

12. In combination, a hash-boiler, a source of watensupply, asupply-pipe connecting IOP both, a pump therein, a suction-valve betweenthe pump and source of water-supply, and a pressure deviceA acted uponby the pump at a predetermined pressure, sald device comprising meansacting initially relativel to the inuence of the water-pressure for cosing the suction-valve and means acting finally for relieving wateryfrom the supply- 1 e. pll. In combination, a water-tank, a asuction-pipe connectin the two, a fee regulator in the tank at ne inletend of the pipe for re ulating the Water fed therethrough, an meansconnecting the regulator wlth the delivery side of the pump which ermitsthe water-pressure to. control the ormer.

14. In combinatlon, a water-tank, a ump, a suction-pipe connecting thetwo, afee -re ulator which is located in the tank at the et end of thepipe, and which normally permits water to ass to the pum and aconnection which subjects the regulator to the waterpres'sure on thedelivery side of the pump for operating the regulator.

15. In combination, a water-tank, a recep- Pum y tacle, means forlsupplying water from the tank to the receptacle, a regulatoi` whichregulates the supply of water to said means, and a connection extendingfrom a point between the said receptacle and said means to the regulatorfor subjecting the latter to the waterpressure of the receptacle.

16. In combination, a water-tank, a rece tacle, means for supplyingwater from tige tank to the receptacle, a regulator for regulatingthesupply of water to said means, a connection extending from a pointbetween the receptacle andthe tank to the regulator for subjecting thelatter to the pressure of the receptacle, and a relief. device in saidconnecttion, which is located in the tank and permits Water to passthrough said connection when the regulator reaches the limit of itsoperation.

In witness whereof I have hereunto set my hand this 25th day ofNovember, 1902.

ERNEST D. HODSDON.

Witnesses: DUGALD McK. MCKILLOP, JOHN J. WALKER.

